azureaksPractitioner

Unlocking Azure Kubernetes Service with Microsoft Entra Workload ID

5 min read Microsoft LearnJul 26, 2026Reviewed for accuracy

Practitioner — Hands-on experience recommended

In the world of cloud-native applications, managing identities and access can become a tangled web. Microsoft Entra Workload ID addresses this by enabling workloads in Azure Kubernetes Service (AKS) to authenticate directly with Azure resources. This integration not only streamlines authentication but also enhances security by leveraging Kubernetes' native capabilities to federate with external identity providers.

At its core, the Microsoft Entra Workload ID utilizes OpenID Connect (OIDC) federation. When your AKS cluster acts as the token issuer, it allows your workloads to exchange service account tokens for Microsoft Entra tokens. This process is facilitated by the Azure Identity client library or the Microsoft Authentication Library (MSAL). On AKS Automatic clusters, this setup is preconfigured, meaning you can start using workload identity without any additional cluster-level configuration. However, on AKS Standard clusters, you need to enable and configure workload identity separately, which adds a layer of complexity.

In production, you should be aware of some limitations. For instance, there’s a cap of 20 federated identity credentials per managed identity, and it takes a few seconds for new credentials to propagate. Additionally, the virtual nodes add-on is not supported with this feature. Ensure you are using AKS version 1.22 or higher and Azure CLI version 2.47.0 or later to take full advantage of these capabilities. Understanding these nuances will help you avoid pitfalls and leverage the full potential of Microsoft Entra Workload ID in your Kubernetes deployments.

Key takeaways

→Utilize Microsoft Entra Workload ID to simplify pod-to-Azure identity management.
→Leverage OIDC federation for secure access to Azure resources from Kubernetes applications.
→Remember that on AKS Automatic clusters, workload identity is preconfigured for immediate use.
→Be aware of the 20 federated identity credential limit per managed identity.
→Ensure your AKS and Azure CLI versions meet the minimum requirements for compatibility.

Why it matters

Implementing Microsoft Entra Workload ID can significantly reduce the overhead of managing authentication in AKS, leading to more secure and efficient application deployments. This streamlining is crucial for teams looking to scale their cloud-native applications without compromising security.

Code examples

.NET

1using Azure.Identity;
2using Azure.Security.KeyVault.Secrets;
3
4string keyVaultUrl = Environment.GetEnvironmentVariable("<key-vault-url>");
5string secretName = Environment.GetEnvironmentVariable("<secret-name>");
6
7var client = new SecretClient(
8    new Uri(keyVaultUrl),
9    new DefaultAzureCredential());
10
11KeyVaultSecret secret = await client.GetSecretAsync(secretName);

Python

1import os
2
3from azure.keyvault.secrets import SecretClient
4from azure.identity import DefaultAzureCredential
5
6def main():
7    keyvault_url = os.getenv('<key-vault-url>', '')
8    secret_name = os.getenv('<secret-name>', '')
9
10    client = SecretClient(vault_url=keyvault_url, credential=DefaultAzureCredential())
11    secret = client.get_secret(secret_name)
12
13if __name__ == '__main__':
14    main()

Java

1package main
2
3import (
4   "context"
5   "os"
6
7   "github.com/Azure/azure-sdk-for-go/sdk/azidentity"
8   "github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azsecrets"
9    "k8s.io/klog/v2"
10
11func main() {
12   keyVaultUrl := os.Getenv("<key-vault-url>")
13   secretName := os.Getenv("<secret-name>")
14
15   credential, err := azidentity.NewDefaultAzureCredential(nil)
16   if err != nil {
17      klog.Fatal(err)
18   }
19
20   client, err := azsecrets.NewClient(keyVaultUrl, credential, nil)
21   if err != nil {
22      klog.Fatal(err)
23   }
24
25   secret, err := client.GetSecret(context.Background(), secretName, "", nil)
26   if err != nil {
27      klog.ErrorS(err, "failed to get secret", "keyvault", keyVaultUrl, "secretName", secretName)
28      os.Exit(1)
29   }
30}